Note 8 - Shareholders' Equity (Details) - Summary of nonvested option activity (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2013
Summary of nonvested option activity [Abstract]
Nonvested at January 1, 2013	521
Granted	322
Vested	(254)
Forfeited	(26)
Nonvested at December 31, 2013	563
Nonvested at December 31, 2013 (in Dollars per share)	$ 5.05

Weighted average grant-date fair value of non-vested options outstanding.

No definition available.

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant